service worker: Simplify class names of the network providers.

WebServiceWorkerNetworkProviderImplFor{Frame,Worker} ->
ServiceWorkerNetworkProviderFor{Frame,Worker}

No behavior change.

Change-Id: Id184839f5a0c509ab01df08fd8b921844b552160
Reviewed-on: https://chromium-review.googlesource.com/c/1466169
Commit-Queue: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Auto-Submit: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#631467}
12 files changed